Whatever happened to the old practice of running a slow flow of knockout gas through the ventilation system to end shit like this? Knock them out, gain entry, shoot the crazy motherfucker, get the kid to fresh air, problem solved. While they're out, run a camera through the vent pipe to see if the door is booby trapped. Surely the FBI, CIA, or DOD have some Inspector Gadget type of shit at their disposal that would give them the ability to determine whether the door was rigged with explosives or not. It would at least give them the exact location of the kid, so they would know where not to poke a hole in order to gain entry from the ceiling. 5 days in and we're no closer to a resolution that when it first happened.
Maybe the plan is to starve him out.